finally..
the problem solved..
just waiting for the new tumbler..
meanwhile i can drive my lovely benz with a screwdriver..
its better than i park it long way from home..
actually you can forced the key to turn to pos#1 so the 2 little holes are line up.
it wont break anything.. but the tumbler...
you will replace it anyway..
thank you for all support my friends...
your information are very helpfull
anyway im not in US.
so can not find Locksmith...:D

The locksmith would be of small value anyways, the problem you had you would need someone familiar with these systems. You did well.
Gilly